CN108624200B - High-temperature-resistant powder coating and preparation method thereof - Google Patents
High-temperature-resistant powder coating and preparation method thereof Download PDFInfo
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- CN108624200B CN108624200B CN201810576465.XA CN201810576465A CN108624200B CN 108624200 B CN108624200 B CN 108624200B CN 201810576465 A CN201810576465 A CN 201810576465A CN 108624200 B CN108624200 B CN 108624200B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention relates to a high-temperature-resistant powder coating and a preparation method thereof. According to the technical scheme, the hollow microspheres are added into the coating, and the high-temperature resistance of the powder coating is effectively improved by utilizing the characteristic of good fluidity of the hollow microspheres; according to the technical scheme, the film forming hardness of the powder coating is adjusted through the hardness difference of the graphene modified epoxy resin and the graphene modified polyester resin, and through the content difference of the graphene in the epoxy resin and the polyester resin, after the graphene is mixed, the internal binding force of the material can form a disordered structure in a coating of the coating, the graphene can be prevented from being re-aggregated, the resistance of permeation factors permeating the surface of a base material is increased, and the corrosion resistance of the coating is greatly improved.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and particularly relates to a high-temperature-resistant powder coating and a preparation method thereof.
Background
The metal corrosion not only brings economic loss to human beings, but also is not beneficial to the protection of natural resources and environment and sometimes even endangers the personal safety. To prevent and slow corrosion, a number of methods of corrosion protection have been developed in manufacturing practices and scientific experiments. Among them, the protection with paint is most convenient and economical, and thus has been widely used.
In order to improve the anticorrosive performance of the coating in various environments, more improvement technologies are provided in the aspect of the coating, for example, components such as graphene are added into the coating to improve the performance of the coating, but in the prior art, the anticorrosive performance of the coating in a high-temperature environment is not greatly broken through, and xylene is used as a solvent in the composition, so that the environment is polluted and the safety of construction personnel is harmed.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant powder coating and a preparation method thereof, and aims to solve the problem that the coating in the prior art is not high in corrosion resistance in a high-temperature environment.
The invention is realized by the following technical scheme:
the high-temperature-resistant powder coating comprises the following components in percentage by weight:
the graphene in the graphene-modified epoxy resin and the graphene in the graphene-modified polyester resin are both graphene with vinyl pyrrolidone groups.
The specific preparation method of the graphene with the vinyl pyrrolidone group comprises the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a vinyl pyrrolidone ethanol solution with the concentration of 3% -5%, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, adding graphene under the stirring condition, stirring and reacting at 50 ℃ for 1-3 hours, and drying to obtain the graphene with vinyl pyrrolidone groups.
The preparation method of the graphene with the vinyl pyrrolidone group comprises the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a 35-60% vinyl pyrrolidone ethanol solution, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, carrying out polymerization reaction at 50 ℃ to prepare polyvinyl pyrrolidone, mixing the prepared polyvinyl pyrrolidone with graphene, and drying to obtain the graphene with vinyl pyrrolidone.
The vinyl pyrrolidone group accounts for 1 percent of the graphene of the vinyl pyrrolidone group in percentage by weight.
The graphene in the graphene modified resin accounts for 1% of the total weight of the graphene modified resin; graphene in the graphene modified polyester resin accounts for 2% of the total weight of the graphene modified polyester resin.
The polyester resin is selected from one or more of saturated polyester resin or unsaturated polyester resin.
The weight ratio of the graphene modified epoxy resin to the graphene modified polyester resin is 1: 2.
the hollow micro-beads are aluminum silicate hollow micro-beads, and the Mohs hardness is 5-7.
The curing agent is tris epoxy propyl isocyanurate.
The preparation method of any one of the high-temperature-resistant powder coatings comprises the steps of uniformly mixing 13-18% of graphene modified epoxy resin, 25-30% of graphite modified polyester resin, 2-3% of curing agent, 10-20% of mica powder, 10-20% of talcum powder, 5-15% of hollow microspheres, 0.3-0.5% of defoaming agent, 0.5-1.0% of flatting agent, 2-3% of high-temperature-resistant pigment and 0.1-0.3% of other auxiliary agents according to weight percentage, and then obtaining the high-temperature-resistant powder coating through melt extrusion, tabletting, cooling, fine crushing, sieving and grading.
The invention has the beneficial effects that:
according to the technical scheme, the hollow microspheres are added into the coating, the characteristic of good fluidity of the hollow microspheres is utilized, so that the fluidity of the high-temperature-resistant powder coating is greatly improved, the high-temperature-resistant powder coating is good in flexibility and hand feeling, the corrosion resistance and the scratch resistance are remarkably improved, a certain amount of the hollow microspheres have a matte effect, the consumption of the flatting agent can be reduced, the cost is greatly reduced, and the high-temperature resistance of the powder coating is effectively improved.
According to the technical scheme, the graphene modified epoxy resin and the graphene modified polyester resin with different using amounts are used, the film forming hardness of the powder coating is adjusted through the different hardness of the graphene modified epoxy resin and the graphene modified polyester resin, and the content of graphene in the epoxy resin and the content of graphene in the polyester resin are different, so that after the graphene modified epoxy resin and the graphene modified polyester resin are mixed, the internal binding force of the material can form an unordered structure in a coating of the coating, the reaggregation of graphene can be prevented, the resistance of permeation factors permeating into the surface of a base material is increased, and the corrosion resistance of the coating is greatly improved.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
The application provides a high-temperature-resistant powder coating which comprises the following components in percentage by weight:
the graphene in the graphene-modified epoxy resin and the graphene in the graphene-modified polyester resin are both graphene with vinyl pyrrolidone groups.
The graphene in the graphene modified epoxy resin accounts for 1% of the total weight of the graphene modified epoxy resin; graphene in the graphene modified polyester resin accounts for 2% of the total weight of the graphene modified polyester resin. According to the technical scheme, the graphene modified epoxy resin and the graphene modified polyester resin with different using amounts are used, the film forming hardness of the powder coating is adjusted through the different hardness of the graphene modified epoxy resin and the graphene modified polyester resin, and the content of graphene in the epoxy resin and the content of graphene in the polyester resin are different, so that after the graphene modified epoxy resin and the graphene modified polyester resin are mixed, the internal binding force of the material can form an unordered structure in a coating of the coating, the reaggregation of graphene can be prevented, the resistance of permeation factors permeating into the surface of a base material is increased, and the corrosion resistance of the coating is greatly improved.
In this embodiment, the preparation method of the graphene-modified epoxy resin and the preparation method of the graphene-modified polyester resin are currently prepared by blending and then performing tabletting, grinding and the like, that is, according to the blending of graphene in the graphene-modified epoxy resin, which accounts for 1% of the total weight of the graphene-modified epoxy resin, under the stirring condition, the graphene is added into the epoxy resin and then extruded, and then the tabletting, grinding and the like are performed to prepare the graphene-modified epoxy resin.
Similarly, the preparation method of the graphene modified polyester resin comprises the steps of adding graphene into the polyester resin under the stirring condition according to the ingredients of which the graphene accounts for 2% of the total weight of the graphene modified polyester resin, then extruding, tabletting, grinding and the like to prepare the graphene modified polyester resin.
The polyester resin is selected from one or more of saturated polyester resin or unsaturated polyester resin; the choice of polyester resin can be determined by those skilled in the art according to the actual circumstances.
In this embodiment, the weight ratio of the graphene-modified epoxy resin to the graphene-modified polyester resin is 1: 2, after the powder coating is formed into a film, the hardness of the coating is ensured by utilizing the hardness of the graphene modified epoxy resin and the elasticity of the graphene modified polyester resin, and meanwhile, the ductility of the coating is ensured.
In the application, the graphene is graphene with vinyl pyrrolidone groups, and the specific preparation method comprises the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a vinyl pyrrolidone ethanol solution with the concentration of 3% -5%, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, adding graphene under the stirring condition, stirring and reacting at 50 ℃ for 1-3 hours, and drying to obtain the graphene with vinyl pyrrolidone groups.
Another preparation method of vinyl pyrrolidone-based graphene comprises the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a 35-60% vinyl pyrrolidone ethanol solution, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, carrying out polymerization reaction at 50 ℃ to prepare polyvinyl pyrrolidone, mixing the prepared polyvinyl pyrrolidone with graphene according to the weight percentage of 1%, and drying to obtain the graphene with vinyl pyrrolidone.
The hollow micro-beads are aluminum silicate hollow micro-beads, the Mohs hardness is 5-7, and the particle size of the hollow micro-beads is 10-50 microns in the application.
The curing agent is tris-epoxypropyl isocyanurate (TGIC).
In the present application, the other auxiliary agent is one or more of a combination of a degasser, a dispersant, a modifier, a toughener, an antioxidant, an accelerator, a relaxer or an ultraviolet light absorber. In the present application, the above-mentioned auxiliaries are all conventional and used in powder coatings as needed, and therefore, the specific structure of each auxiliary is not described in detail in the present application.
In the present application, the high temperature resistant pigment is a combination of a dye and a pigment, in the present application, the color of the dye is prior art, and the color of the pigment is also prior art, so that the color obtained by matching one or more of the dye or the pigment according to the needs of the skilled person is not the scope of the present application, i.e. the powder coating of the present application can be any color.
Example 1
The high-temperature-resistant powder coating comprises the following components in percentage by weight:
the components are stirred and then blended to ensure uniform mixing, and then the preparation process of the powder coating is carried out, wherein the blending extrusion is carried out according to the proportion, and then the working procedures of tabletting, fine separation, inspection, metering, packaging and the like are carried out to obtain the finished product graphene powder coating.
Example 2
The high-temperature-resistant powder coating comprises the following components in percentage by weight:
the components are stirred and then blended to ensure uniform mixing, and then the preparation process of the powder coating is carried out, wherein the blending extrusion is carried out according to the proportion, and then the working procedures of tabletting, fine separation, inspection, metering, packaging and the like are carried out to obtain the finished product graphene powder coating.
Example 3
The high-temperature-resistant powder coating comprises the following components in percentage by weight:
the components are stirred and then blended to ensure uniform mixing, and then the preparation process of the powder coating is carried out, wherein the blending extrusion is carried out according to the proportion, and then the working procedures of tabletting, fine separation, inspection, metering, packaging and the like are carried out to obtain the finished product graphene powder coating.
Example 4
The high-temperature-resistant powder coating comprises the following components in percentage by weight:
wherein the weight ratio of the graphene modified epoxy resin to the graphene modified polyester resin is 1: 3.
the components are stirred and then blended to ensure uniform mixing, and then the preparation process of the powder coating is carried out, wherein the blending extrusion is carried out according to the proportion, and then the working procedures of tabletting, fine separation, inspection, metering, packaging and the like are carried out to obtain the finished product graphene powder coating.
Example 5
The high-temperature-resistant powder coating comprises the following components in percentage by weight:
wherein the weight ratio of the graphene modified epoxy resin to the graphene modified polyester resin is 1: 3.
the components are stirred and then blended to ensure uniform mixing, and then the preparation process of the powder coating is carried out, wherein the blending extrusion is carried out according to the proportion, and then the working procedures of tabletting, fine separation, inspection, metering, packaging and the like are carried out to obtain the finished product graphene powder coating.
The properties of the high temperature resistant powder coating are shown in the following table:
the powder coating prepared by the technical scheme has heat resistance, does not crack or bubble at the temperature of 450 ℃ for 300h and at the temperature of 500 ℃ for 72h, has slight change in color, does not lose luster or soften after being wiped back and forth for 200 times by methyl ethyl ketone, has acid resistance (5% HC L) for 300h, does not fade, bubble or fall, and has alkali resistance (5% NaOH) for 300h, does not fade, bubble or fall.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The high-temperature-resistant powder coating is characterized by comprising the following components in percentage by weight:
the graphene in the graphene-modified epoxy resin and the graphene in the graphene-modified polyester resin are both graphene with vinyl pyrrolidone groups;
graphene in the graphene modified epoxy resin accounts for 1% of the total weight of the graphene modified epoxy resin; graphene in the graphene modified polyester resin accounts for 2% of the total weight of the graphene modified polyester resin;
the weight ratio of the graphene modified epoxy resin to the graphene modified polyester resin is 1: 2;
the preparation method of the graphene modified epoxy resin comprises the steps of adding graphene into the epoxy resin under the stirring condition according to the ingredient of the graphene modified epoxy resin, wherein the graphene accounts for 1% of the total weight of the graphene modified epoxy resin, then extruding, tabletting and grinding to prepare the graphene modified epoxy resin;
according to the preparation method of the graphene modified polyester resin, the graphene is added into the polyester resin and then extruded under the stirring condition according to the ingredients of the graphene modified polyester resin, wherein the graphene accounts for 2% of the total weight of the graphene modified polyester resin, and then tabletting and grinding are carried out to prepare the graphene modified polyester resin;
the curing agent is tris epoxy propyl isocyanurate.
2. The high-temperature-resistant powder coating as claimed in claim 1, wherein the graphene with vinyl pyrrolidone groups is prepared by the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a vinyl pyrrolidone ethanol solution with the concentration of 3% -5%, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, adding graphene under the stirring condition, stirring and reacting at 50 ℃ for 1-3 hours, and drying to obtain the graphene with vinyl pyrrolidone groups.
3. The high-temperature-resistant powder coating as claimed in claim 1, wherein the preparation method of the graphene with vinyl pyrrolidone groups comprises the following steps:
dissolving monomer vinyl pyrrolidone in ethanol to prepare a 35-60% vinyl pyrrolidone ethanol solution, adding a hydrogen peroxide catalyst and an azodiisobutyronitrile initiator under the stirring condition, carrying out polymerization reaction at 50 ℃ to prepare polyvinyl pyrrolidone, mixing the prepared polyvinyl pyrrolidone with graphene, and drying to obtain the graphene with vinyl pyrrolidone.
4. The refractory powder coating of claim 1, wherein the vinylpyrrolidone groups are 1% by weight of the vinylpyrrolidone-based graphene.
5. The high temperature resistant powder coating of claim 1, wherein the polyester resin is selected from one or more of a saturated polyester resin or an unsaturated polyester resin in combination.
6. The high temperature resistant powder coating of claim 1, wherein said cenospheres are aluminum silicate cenospheres with a mohs hardness of 5-7.
7. The preparation method of the high-temperature-resistant powder coating of any one of the claims 1 to 6 is characterized in that 13 to 18 weight percent of graphene modified epoxy resin, 25 to 30 weight percent of graphite modified polyester resin, 2 to 3 weight percent of curing agent, 10 to 20 weight percent of mica powder, 10 to 20 weight percent of talcum powder, 5 to 15 weight percent of hollow micro-beads, 0.3 to 0.5 weight percent of defoaming agent, 0.5 to 1.0 weight percent of flatting agent, 2 to 3 weight percent of high-temperature-resistant pigment and 0.1 to 0.3 weight percent of other auxiliary agents are uniformly mixed, and then the high-temperature-resistant powder coating is obtained by melt extrusion, tabletting, cooling, fine crushing, sieving and grading.
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| CN201810576465.XA CN108624200B (en) | 2018-06-06 | 2018-06-06 | High-temperature-resistant powder coating and preparation method thereof |
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| CN108624200B true CN108624200B (en) | 2020-07-24 |
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| CN109280459A (en) * | 2018-08-07 | 2019-01-29 | 嘉兴市嘉盛绝缘材料有限公司 | Low volatilization polyester insulating lacquer of a kind of high heat resistance and preparation method thereof |
| CN110205001A (en) * | 2019-05-27 | 2019-09-06 | 常州烯源纳米科技有限公司 | Graphene-based powdery paints and its production technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040714A (en) * | 2010-11-02 | 2011-05-04 | 浙江大学 | Preparation method of polymer-grafted graphene |
| CN104312391A (en) * | 2014-10-14 | 2015-01-28 | 江苏华光粉末有限公司 | Graphene antistatic powder coating and preparation method of antistatic powder coating |
| CN105469858A (en) * | 2016-01-05 | 2016-04-06 | 厦门凯纳石墨烯技术股份有限公司 | Polyvinylpyrrolidone/graphene conductive slurry, preparation method and application |
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| JPS5699264A (en) * | 1980-01-10 | 1981-08-10 | Nippon Ester Co Ltd | Production of polyester resin composition for powder paint |
| US20150252170A1 (en) * | 2013-03-15 | 2015-09-10 | Melior Innovations, Inc. | Black ceramic additives, pigments, and formulations |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040714A (en) * | 2010-11-02 | 2011-05-04 | 浙江大学 | Preparation method of polymer-grafted graphene |
| CN104312391A (en) * | 2014-10-14 | 2015-01-28 | 江苏华光粉末有限公司 | Graphene antistatic powder coating and preparation method of antistatic powder coating |
| CN105469858A (en) * | 2016-01-05 | 2016-04-06 | 厦门凯纳石墨烯技术股份有限公司 | Polyvinylpyrrolidone/graphene conductive slurry, preparation method and application |
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